The kind of diversity that's mentioned everywhere, with parameters like race, sex, class, gender identity, sexual orientation, and religion. Does not include "deeper" parameters of real diversity such family size, medical history, career aspirations, and favourite foods.

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed